http://www.oxfordowl.co.uk Lots of games, activities and advice for parents
http://ictgames.com/literacy.html Some excellent games
The links below are for Woodlands Junior School English and Maths links but there is help in all topics if you look at the resources page of their website:
http://bbc.co.uk/schools/ks1bitesize/literacy This website supports all subjects and key stages - a very useful resource
http://rmeasimaths.com Your child should have a log in for this page. If not, please ask your child's teacher
http://topmarks.co.uk/maths-games Some fun and useful games
http://phonicsplay.co.uk Games for younger children
http://www/crickweb.co.uk Also for younger children